Molding machine



Feb. 16 1926. 1,573,009

O. MLLER MOLDING MACHINE ff Filed April 2o, 1925 jjr ver: far.'

Patented Feb. 16, 1926.

UNITE-D STATES trastos4 PATENT oFFlcE.'v

' HOLDING MACHINE.

' Application mea-April 2o, 1925. serial No. 24,594.

To all whom t may cof/wem:

Be it known that I, O'rro MLLER, a citizen of 'Germany, residing .at Esslingenon-the Neckar, Germany, have invented certain new and useful Improvements in Mold: ing Machines, of which the following is a specification.

'My invention relate-s to molding machines. and more especiallyto the type of molding machines which are equipped with turn-over plates which can be run in and out on tables or the like. It is an object of my invention to improve this type of machine generally and to overcome certain drawbacks adhering to them. v

In these machines, the turn-over plates are supported in bearings without however being readily exchangeable therein, 'and the a-sks are secured to the turn-over plates by means of screws, lugs and the like, which is rather troublesome. The loosening .of the turn-over plate by tapping is much interfered with by the fact that the plate is supported in bearings, and so the pattern.

l5 does not come odreadily' and the mpld is often damaged. Moreover the pins and bearings foil the turn-over plate considerably increase th e width and weight of the machine, and separate mechanical means have to be provided for handling the plate. All these drawbacks are overcome according to this-invention by altogether dispensing with pins von the turn-over plate and preferablyproviding instead two eyes at opposite sides of the plate, 'in which pins, reciprocating on the frame of the machine can be inserted. These pins are preferably designed in' such a manner as'to secure not only the turn-over plate but also the flask.4

When the pms are withdrawn, the turnover i plate is4 perfectly free and can be tapped like any other pattern. The width and weight of the machine are much .reduced by this arrangement, no separate means for handling the turn-over plate being required, as the raising and lowering of the plate'is leffected exclusively by means ofa sin`gle cylinder. If the pins are so made as to engage the ask, separate means for securing the latter are unnecessary.

In the-drawings affixed to this vspecificatlon and forming part thereof a machine embodying my invention is illustrated dia- A .grammatically. `by way of example.y

In the drawings Figure 1 is a cross on the line of the axis of the reciprocating pin-s, while Figure 2 is an elevation `showing'the table andthe presser plate run out. i

Referring to the drawings a is lan upper' head, at the bottom of which a sliding presser plate a is suspended in guides a. b is a lower head, and -e are four pillars. connecting the two heads.

A track b is secured to the lower head `and a table 0 is arranged to run on this track. The table o is arranged to support the turn-over plate z', andv suitable means, for instance a cylinder o are provided on the lower head b for exertingvan upwardly directed pressure on a boss o of the table o.

Two frames f', f extend along the shorter sides of the rectangle formed by the pillars e ,and are guided on these pillars by pairs of sleves f, g at the lower end of their stroke.

A pin z, i-s adapted' to slide but' held against rotation in each frame f f, the ends of both pins being provided withright and left hand threadsl respectively, and threaded sprocket wheels n are seated on the threaded j'55 section ofthe machine I f, and supported by rings ends. The wheels n are connected with wheels n on a shaft n :by chains fn, and rotation is imparted to the shaft n by means of a sprocket wheel n4 M and a chain? It will be understood that upon rotation of l.

72, will be displaced in enter hole-s or recesses Z of they flask m. w, I

are pairsof eyes formed at the .front and rear ends of the turn-over plate i, and fv, fo

are corresponding eyes at one end of each frame f. Pins g may be 'inserted in the eyes v and the corresponding eyes m, m so as to secure the turn-over plate to the frames f if desired. It willbe understood that pnly4 one eye u and m respectively is shown, as the opposite parts are cncealed by those that are visible. Y A

z, e are pins projecting on the outside of each frame f and adapted to be engaged br hooks which are rotatably carried on a saft y and provided with counter weights y l 'lhe table o has plane faces p adapted to cooperate with corresponding faces on the sleeves f lw for guiding the table when it -run into the machine.

moves independently of the frames f.

In operation the table is run out of the machine on the track b as shown in Fig. 2, a turnover plate i and a flask m are placed on the table o, the flask is filled with sand and the table and the presserlate a are When tlie parts are ins h are advanced tothe machine as described,

in position, the ward the inside o securing the turn-over plate and the flask to the frame f, and the table is raised by means of the cylinder c, so that the sand in the flask m is compressed by the presser plate a. At the same time the hooks g/ enga e the pins e ofthe frames f.

Wen the pressing operation has come to an end, the table o is lowered and run out, while the frames f with the turn-over plate and the flask m are retained'by the ook y. The presser plate a is run out also and the plate is turned over about thev pins t 1800- as shown in Fig-2. The table 1s now run in anew and raised as far as the bottom of the flask m, and the pins k are withdrawn from the eyes The turnover plate z' is now free and may be loosened by tapping in the usual manner without interference of any kind. The ins h are now advanced again but only as ar as required. for securing the turn-over plate to the frames f', without however engaging the flask m, and the table with the flask is lowered while the turn-over plate remains suspended on the frames and run out. The plate z' is then turned over into its initial position, the table o is raised for releasing the pins z of the frames f from the hooks y, and then lowered together with the Yframes f and the .turn-over plate as far as a person edl upper and lower heads, a presser plate secured to said upper head, a table on said lower head adapted to be run in and outv of. the machine, means for raising and low= ermg said table with regard to said presser' plate, a turn-over plate adapted to be placed on said table, eyes on opposite sidesof said turn-over plate, frames adapted to be displaced in conformity with the raising and lowering of said table, a pin'in each frame adapted to be reciprocated and-to enter one of said eyes and, means for reciprocating said pins in said frames.

2. Molding machine comprising connected upper and lower heads, a presser plate secured to said up er head, a table on said lower head adapted) to be run in and out of the machine, means for raising and lowering said table with regard to said presser plate, a turn-over late adapted to be placed on said table, a ask adapted to be placed on said plate, eyes onv opposite sides of said turn-over plate, frames adapted to be displaced in conformity with the raising and lowering of said table, pins adapted tov be reciproeated in each frame and to enter one of said eyes, means for reciprocating said pins in said frames and a point at the end of each pin adapted to engage said flask.

3. Molding machine comprising connected upper and lower heads, a presser plate secured to said upper head, a table on said lower head adapted to be run in and out of the machine` means for raising and lowering said table with regard to said presser plate, a turn-over plate adapted to be placed on said table, eyes on opposite sides of said turn-over plate, frames a-dapted to be displaced in conformity with the raising and lowering of said table, automatic means for intermittently securing said frames to one of said heads, pins adapted to be reci procated in each frame and to enter said eyes and means for reciprocating said pins in said frames.

4. Molding machine comprising connected upper and lower heads, a presser plate secured to said upper head, a table on said lower head adapted to be run in and out of the machine, means for raising and lowering said table with regard to said presser plate, a turn-over plate adapted to be placed on said table, eyes on opposite sides of said turn-over plate, frames adapted to be displaced in conformity with the raising and lowering of said table,`a pin secured to cach frame, hooks pivoted to said upper head and adapted to engage said pins on said -frames, pins adapted to be reciprocated in out of the. machine, means for raising and adapted to be reciprocated in each frame lowering said table with regard rto said and to enter said eyes, and means for recip? presser plate, a turn-over plate adapted to rocating said'pns in said frames. l0 be placed on4 said table, eyes on opposite In testimony .whereof I aix my sig- 5 sides of said turn-over plate, frames avdaptnature.

ed "to be displaced in conformity with the raising and lowering of saidgtable, pins OTTO MULLER. 

